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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2162) add ability in Fair Scheduler to optionally configure maxResources in terms of percentage
Date Mon, 21 Aug 2017 23:03:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-2162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16135986#comment-16135986
] 

ASF GitHub Bot commented on YARN-2162:
--------------------------------------

Github user flyrain commented on a diff in the pull request:

    https://github.com/apache/hadoop/pull/261#discussion_r134350951
  
    --- Diff: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/AllocationFileLoaderService.java
---
    @@ -605,13 +606,15 @@ private void loadQueue(String parentName, Element element,
     
         queueAcls.put(queueName, acls);
         resAcls.put(queueName, racls);
    -    if (maxQueueResources.containsKey(queueName) &&
    -        minQueueResources.containsKey(queueName)
    -        && !Resources.fitsIn(minQueueResources.get(queueName),
    -            maxQueueResources.get(queueName))) {
    +    ResourceConfiguration maxResourceConf = maxQueueResources.get(queueName);
    +    if (maxResourceConf != null &&
    +        !maxResourceConf.isPercentage() &&
    --- End diff --
    
    Add the warning in method FSQueue#getMaxShare()


> add ability in Fair Scheduler to optionally configure maxResources in terms of percentage
> -----------------------------------------------------------------------------------------
>
>                 Key: YARN-2162
>                 URL: https://issues.apache.org/jira/browse/YARN-2162
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: fairscheduler, scheduler
>            Reporter: Ashwin Shankar
>            Assignee: Yufei Gu
>              Labels: scheduler
>         Attachments: YARN-2162.001.patch, YARN-2162.002.patch
>
>
> minResources and maxResources in fair scheduler configs are expressed in terms of absolute
numbers X mb, Y vcores. 
> As a result, when we expand or shrink our hadoop cluster, we need to recalculate and
change minResources/maxResources accordingly, which is pretty inconvenient.
> We can circumvent this problem if we can optionally configure these properties in terms
of percentage of cluster capacity. 



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